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Air pressure and fuel mileage

I drove to Lebanon, NH today, 120 miles each way. I checked the tire pressure on the snow tires because they tend to loose air slowly and with this cold weather I knew they would be low. They were 25/20lbs f/r. I tried to fill them but the pump was frozen and I was late. I averaged 69mph and got 25.4mpg. I filled the tires after my meeting and averaged 74mph and 31.4mpg coming home. Can you believe there is such a difference with the correct tire pressure? Just trying to help out some fellow vdubbers.


[Modified by bluegti16v, 6:14 PM 1-24-2003]
 
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